In　this　paper,　flash　evaporation　and　thermal　vapor　compression　are　used　to　reduce　heat　consumption　of　CO2　capture　processes　and　two　improved　capture　systems　are　proposed.　One　is　the　flash　evaporator　(FE)　and　thermal　vapor　compressor　(TVC)-aided　system,　the　other　is　the　heated　flash　evaporator　(HFE)　and　thermal　vapor　compressor　(TVC)-aided　system.　Analyses　are　carried　out　to　verify　their　effectiveness　in　reducing　heat　consumption.　Compared　with　the　base　CO2　capture　system　of　108.76　t/h　CO2　capture　capacity　from　a　660　MW　coal-fired　power　unit,　the　FE-TVC-aided　capture　system　reduces　the　specific　heat　consumption　from　4.421　GJ/tCO(2)　to　4.161　Gj/tCO(2),　and　the　specific　exergy　consumption　from　1.368　GJ/tCO(2)　to　1.275　GJ/tCO(2),　the　corresponding　energy　saving　and　exergy　saving　are　10.3%,　and　the　plant　electric　efficiency　penalty　is　decreased　from　11.83%　to　11.02%,　on　condition　that　the　CO2　recovery　ratio　is　set　at　90%.　Compared　with　the　base　CO2　capture　system,　the　HFE-TVC-aided　capture　system　reduces　the　heat　consumption　from　4.421　GJ/tCO(2)　to　4.057　GJ/tCO(2),　and　the　specific　exergy　consumption　from　1.368　GJ/tCO(2)　to　1.243　GJ/tCO(2),　the　corresponding　energy　saving　and　exergy　saving　are　12.5%,　and　the　plant　electric　efficiency　penalty　is　decreased　from　11.83%　to　10.80%.　(C)　2014　Elsevier　Ltd.　All　rights　reserved.